======================== unified (from filesystem) ========================
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                                        'duration'  '370'
                                          'artist'  'Steve Reich'
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                                         'release'  'Music For 18 Musicians'
                                           'title'  'Pulses'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '14'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments-contemporary'
                                             'bpm'  '137.2'
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                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '137.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments-contemporary'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998-04-25'
'TIT2' (Title/songname/content description)         'Pulses'
'TKEY' (Initial key)                                '11B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Steve Reich'
'TPE2' (Band/orchestra/accompaniment)               'Steve Reich'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Nonesuch'
'TRCK' (Track number/Position in set)               '14/14'
'TSO2'                                              'Reich, Steve'
'TSOP' (Performer sort order)                       'Reich, Steve'
'TSRC' (ISRC (international standard recording code))  'USN019745115/USNO19745115'
'TXXX:ASIN'                                         'B00005HHGS'
'TXXX:BARCODE'                                      '4943674509720'
'TXXX:CATALOGNUMBER'                                'WPCS-5097'
'TXXX:MusicBrainz Album Artist Id'                  'a3031680-c359-458f-a641-70ccbaec6a74'
'TXXX:MusicBrainz Album Id'                         '7ec00a89-d70c-4203-b68c-ffe20865adc6'
'TXXX:MusicBrainz Album Release Country'            'JP'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'a3031680-c359-458f-a641-70ccbaec6a74'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['classical', 'contemporary', 'post-modern']
'TXXX:lastfmtags'                                   ['minimalism', 'contemporary classical', 'minimal', 'classical', 'minimalist']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.03 dB'
'TXXX:replaygain_track_peak'                        '0.766940'
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========================== row from database ==========================
                                              'id'  675641
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/1978 - Music For 18 Musicians/14 - Pulses.mp3
                                         'working'  None
                                         'bitrate'  164
                                    'duration_sec'  370
                                           'genre'  prerock-classical or classical instruments-contemporary
                                        'filesize'  7630869
                                           'mtime'  1621853506
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 1978 14 prerock classical classical instruments contemporary
                                      'tag_artist'  Steve Reich
                                     'tag_release'  Music For 18 Musicians
                                       'tag_title'  Pulses
                                             'bpm'  137.2
                                    'search_title'  'pulses':1
                                   'search_artist'  'reich':2 'steve':1
                                  'search_release'  '18':3 'for':2 'music':1 'musicians':4
                                     'search_rest'  '1978':1 'classical':3 'contemporary':5 'instruments':4 'prerock':2
                                    'search_combo'  '18':6C '1978':8 'classical':10 'contemporary':12 'for':5C 'instruments':11 'music':4C 'musicians':7C 'prerock':9 'pulses':1A 'reich':3B 'steve':2B
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'Q-PIANO-3', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['minimalism', 'contemporary classical', 'minimal', 'classical', 'minimalist']
                                        'tag_date'  1998
                                     'discogstags'  ['classical', 'contemporary', 'post-modern']

============================== file details ==============================
                                           'mtime'  1621853506.1872213  (2021-05-24 12:51:46)
                             'size'  7630869